查询词典 sodium hydroxide

The factors which mostly affect the quality and output of the product including molar proportion of reagents, reaction temperature, alkaline concentration and reaction time are analyzed. After orthogonal experiment, it is concluded that the optimized reaction condition is that acetone and furfural are charged with equal molar quantities at 40 with sodium hydroxide (0.10 mol/L) and the operation time 5 h.

通过对影响亚糠基丙酮质量和收率的主要因素原料配比、反应温度、碱浓度、反应时间等单因素实验，探索出合成亚糠基丙酮的优化反应条件为：原料配比n：n=1.0：1.0、反应温度40℃、氢氧化钠溶液浓度为0.01 mol/L、反应时间5h。

The alkylation of a-methylene of PhSO2CH2COPh with alkyl halides catalyzed by quaternary ammonium base resin in 50% aqueous sodium hydroxide solution was investigated.

本文以季铵碱树脂作为聚合物固载的相转移催化剂，在50%氢氧化钠水溶液中催化α-苯磺酰基苯乙酮(1)的α-亚甲基的烷基化反应。

It was based on the reaction between thiamine and hexacyanoferrate in sodium hydroxide medium to give CL signal,which was enhanced by cetyltrimethyl ammonium bromide.

基于在N aOH碱性中，铁氰化钾可以直接氧化维生素B1产生化学发光，而十六烷基三甲基溴化铵的存在可以大大增强这一化学发光强度，结合流动注射分析技术，在研究并优化化学发光条件的基础上，建立了测定维生素B1的化学发光分析方法。

Method］With the stem and leaf of Andrographis panniculata as the material, after crushed the andrographolide from them was extracted with ultrasonic method in sodium hydroxide solution at different pH value.

方法］以穿心莲茎叶为材料，粉碎后在不同pH值的NaOH溶液中，利用超声波法提取穿心莲内酯。

When making biodiesel, you want to convert these free fatty acids to soap with a base like sodium hydroxide—but you need to put in a little extra to act as a catalyst for the virgin bean oil, too.

生物柴油时，你想转换这些游离脂肪酸肥皂，但是你需要把多赚一点作为一个处女豆油的催化剂，也。

A new organic compound:N,N'-bis(1,10-phenanthroline-2-formacyl)-4,4'-diamino-diphenylmethane was synthesized via oxidation,esterification,substitution,hydrolysis, amidation of 1,10-phenanthroline as the starting material with chemical reagents (hydrogen peroxide,benzoyl chloride,potassium cyanide,sodium hydroxide solution,4,4'-diamino-diphenylmethane).

以邻菲啰啉为起始原料，与双氧水反应合成邻菲啰啉-N-氧化物，接着与苯甲酰氯、氰化钾、NaOH水溶液一一反应合成中间体邻菲啰啉-2-甲酸，再与4，4′-二氨基苯基甲烷进行酰胺化反应合成目标产物。

OO from the beginning of a three-year sales of chemical raw materials, specific printing ink, printing ink, sodium hydroxide, liquid (30-50%) hydrochloric acid, electrical cleaning agents, electrical agents, detergents, bactericidal Algicide, corrosion inhibitors, scale inhibitors, polyacrylamide (cation-anion), toluene, glacial acetic acid, such as bleaching, aluminum-based industries to the production of chemical raw materials used.

从二OO三年开始化工原料的销售，具体有印刷油墨、印刷水墨、氢氧化钠、液碱（30-50%）盐酸、电器清洗剂、电器保护剂、除垢剂、杀菌灭藻剂、缓蚀剂、阻垢剂、聚丙烯酰胺、甲苯、冰醋酸等漂染、铝型才行业的生产用化工原料。

Results showed that the optimum condition in carboxy methylation were: 15 percent sodium hydroxide , 20 % chloroacelic acid, alkalified 35℃, etherification 50℃, etherification time 120 min.

甜菜膳食纤维羧甲基化改性的最佳条件：15％氢氧化钠、20％一氯乙酸、35℃碱化温度、50℃醚化温度、2.0h醚化时间。

This product is made from grass pulp black liquor of most extensive alka line sul fate process sodium hydroxide process pulp technology by distinctive chemical property modifying and sloar dehydrating .

以造纸工业中应用最为广泛的碱法造纸工艺所产生的草浆黑液为主要原料，以独创的化学改性方法和太阳能脱水干燥技术制得本产品，且研究开发出本产品在诸多领域中的用逢，为治理造纸黑液对自然环境的严重污染寻得一条行之有效的途径。

Though the analysis of all kinds of the influencing factors such as the proportion between bone glue and water, the quantity of sodium hydroxide, the time of reaction, a new modifying technics which is different from the traditional way was developed.

研究了以环氧氯丙烷接枝共聚改性骨胶的制备工艺，通过对影响该合成工艺的各种因素如水胶比、加碱量、碱解时间等的分析，初步探讨出了一条与传统改性工艺不同的改性路线。

What would he tell Judith and the children?

他将怎样告诉朱迪丝和孩子们呢？

I this is at that time, the opinion with peacockish true girl is full of in a heart.

这就是当时的我，一个心中布满虚荣的女孩子真实的想法。